<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
      </el-alert>
      <el-steps :space="200" align-center :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormrules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="">
              <el-cascader v-model="addForm.goods_cat" clearable :options="cateList" :props="cateProps"
                @change="catehandleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in manyTabledata">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border v-for="(item2, index) in item.attr_vals" :key="index" :label="item2"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in onlyTabledata">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload :headers="headersConfig" :action="upUrl" :on-preview="handlePreview" :on-remove="handleRemove"
              :on-success="headersSuccess" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btn" @click="addFormgoodsList">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewdialoVisible" width="50%">
      <img :src="previewUrl" class="preImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'App',
  created () {
    this.getcateList()
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ]
      },
      cateList: [],
      manyTabledata: [],
      onlyTabledata: [],
      previewdialoVisible: false,
      upUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      previewUrl: '',
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        expandTrigger: 'hover',
        checkStrictly: true
      },
      headersConfig: {
        Authorization: window.sessionStorage.getItem('token')
      }
    }
  },
  methods: {
    async getcateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('请求错误')
      this.cateList = res.data
      console.log(this.cateList)
    },
    catehandleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('前先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        })
        this.manyTabledata = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        this.onlyTabledata = res.data
      }
    },
    handlePreview (file) {
      this.previewdialoVisible = true
      this.previewUrl = file.response.data.url
    },
    handleRemove (file) {
      const removepicUrl = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === removepicUrl)
      this.addForm.pics.splice(i, 1)
    },
    headersSuccess (response) {
      const picsUrl = { pic: response.data.tmp_path }
      this.addForm.pics.push(picsUrl)
    },
    addFormgoodsList () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('验证失败')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 动态参数attrs
        this.manyTabledata.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals.join(',') })
        })
        // 静态参数attrs
        this.onlyTabledata.forEach(item => {
          form.attrs.push({ attr_id: item.attr_id, attr_value: item.attr_vals })
        })
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        // 编程式导航跳转到商品列表
        this.$router.push('/goods')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.el-steps {
  margin: 12px 0;
}

.el-cascader {
  width: 300px;
}

.el-checkbox {
  margin: 0 5px 0 0;
}

.preImg {
  width: 100%;
}

.btn {
  margin-top: 10px;
}
</style>
